John Oliver, Jon Stewart, Jimmy Fallon, Seth Meyers and more had cameos during the July 21 episode of "The Late Show With Stephen Colbert."

Current “Late” host Stephen Colbert announced the end of the talk show institution last week, seeming entirely caught by surprise. Letterman helmed the series from 1993 until his retirement in 2015. He responded to the news on Monday, sharing a 20-minute supercut of bits taking potshots at the Tiffany Network.

NEW YORK — Stephen Colbert has received support from his fellow late-night TV hosts following his cancellation by CBS, including from his predecessor. David Letterman, who was the host of “The Late Show” for 22 years, used his YouTube channel to post a video montage of the many times he ripped into CBS over the years for various reasons.

In 1993, he started working as a writer-producer on Late Night with David Letterman, which aired on NBC. Burnett ultimately made the move to CBS with Letterman when The Late Show was picked up at that network.